Pipe Coupling manufacturer & supplier in China: effectively repair pipeline & prevent leakage.

The coupling can be used to repair various kinds of pipe connections to prevent the leakage of fluids or gases, without affecting the continuity and integrity of the pipeline systems.

  • Changing the pipe size

  • Repairing breaks or leaks

  • Terminating the pipe operation

  • Increasing the total length of the pipes

What is Coupling?

Pipe coupling is an indispensable fastener in piping systems. It is used to connect pipes of varying types and sizes to increase overall pipe length. Different types of couplings are suitable for different piping systems, so it is very important to choose correct couplings to ensure the normal operation of the pipeline system.

In water and wastewater piping repair, coupling has the advantages of flexibility and resilience. It can be used to repair various types of water and sewage pipe connections, such as increasing overall pipe length, terminating pipe runs, changing the size of pipes, or repairing breaks or leaks. In short, coupling offers a relatively simple and quick method to connect different pipe sections without compromising continuity and integrity.

Coupling can be made from several different materials, such as carbon steel, stainless steel, cast iron, etc. It is available in half or full size, and with threaded or socket weld connections. Due to the convenience of use, it is widely used in civil construction, industry, agriculture and other fields.

Applications

  • Natural gas pipeline

  • Oil pipeline

  • Chemical Pipeline

  • HVAC Piping

Technical Specifications

Pipe caps have many sizes, no matter for carbon steel or stainless steel. The following information is just about their sizes.

Material Carbon steel:  ASTM A105

Stainless steel: ASTM A182 Grade F304/L and F316/L
Dimensions Range (ASME B16.11) 1/4'', 1/2'', 3/4'', 1'', 1 1/2'', 2'', 3'' and up to 4 inches.
Coupling Types Full Coupling, Half Coupling, Reducing Coupling
Pressure Ratings 3000#, 6000#, 9000#

According to construction Coupling list

Full coupling

Full coupling is used for connecting small diameter pipes whose size from 1/8 inch to 4-inch. It has both socket weld ends or threaded ends. Threaded full coupling is the same shape, but just the ends are threaded. Full coupling is available as per ASME B16.11 and ASTM A182 SS standards.

Half coupling

Half coupling is a kind of pipe fitting used to connect two pipes and other accessories. It can be either threaded or socket welded. Only one side has a socket or thread end, whereas another one can be welded directly to the pipe to form a connection.

Reducing coupling

Reducing coupling is a type of connector used to connect pipes with the same or different diameters. Both the ends of the reducing coupling are threaded or socket welded. And it mainly used to reduce the flow of fluid, from a larger pipe to a smaller pipe (Vice versa).

According to materials: Coupling list

Carbon steel coupling

Carbon steel coupling is a type of economical and practical pipe fitting, which is made of carbon steel. It has the advantages of high strength and wear resistance. So it is suitable for various piping systems with low pressure and low temperature, such as oil and natural gas.

Stainless steel coupling

Stainless steel coupling is a kind of common pipe fitting, which is made of stainless steel. It has the advantages of corrosion resistance, high temperature resistance and pressure resistance. So it is suitable for various piping systems, including water supply, drainage, HVAC and more.

Cast iron coupling

Cast iron coupling is a kind of heavy duty pipe fitting, which is made of cast iron. It has the advantages of high strength and corrosion resistance. So it is suitable for some large diameter, high pressure pipeline systems, such as chemical, petrochemical and so on.

Coupling type According To Connection Ways

Socket weld coupling

Socket weld coupling is a kind of pipe fitting with both sides of the socket welding connection to join two pipes of the same size. Its pressure rating includes class 3000, class 6000 and class 9000. It can extend the pipe length and provide good flow characteristics.

Threaded coupling

Threaded coupling Threaded coupling is a type of pipe fittings normally used in low-pressure small diameter pipes. Threaded coupling means the coupling has threads at one or both ends. Its pressure rating includes class 3000 and class 6000.

Coupling Type According To Manufacturing Process

Forged Coupling

Forged coupling is made of steel ingot or round bar, through heating and forging, and then machining thread. The common materials are carbon steel, alloy steel and stainless steel.

Cast Coupling

Cast coupling is made by melting the steel ingot, and pouring it into a fixed pipe coupling model, which is then cooled. It is used to connect two pipes. The common material is cast iron.

Features

More convenient

The structural design of the coupling especially focuses on the fixation and connection of the pipeline, and adopts a simple and compact linear structure, which makes it more convenient and fast in the construction of the project.

Ensure the stability and safety

The pipe couplings are used to connect pipes to provide stable support and fixation. They can effectively prevent the displacement and loosening of the pipeline and ensure the safe operation of the pipeline system.

Flexibility And Resilience

In water and wastewater piping repair, couplings can be used to terminate or extend pipe runs, change the size of pipe, or repair breaks or leaks.

Easy Installation And Maintenance

The design of the pipe coupling is simple, and the use method is also easy to understand, so the installation and maintenance is very convenient.

Customization Options

Customization is available. Metleader can provide flexible customized production service according to the drawings or technical data from clients to meet special requests.

Comparisons

  • Famous steel pipe factories TPCO, Bao Steel etc

  • Production test – 100% test

  • Non-conforming products – Reject

  • NDT – 100% inspect

  • Customized service – available

  • Final inspection – 100% inspect

Other supplier

  • Local small factories raw material

  • Sampling test

  • Non-conforming products: Repair

  • Sampling test

  • Not sure

  • Sampling test

Quality Assurance

1) Raw materials purchase: All of the raw materials are from large formal manufacturers.

2) Raw materials inspection: Common testing, like chemical composition to analysis of element of C, S, P, Mn, Si, Cr and Ni. And do mechanical property testing.

3) Production guarantee: The couplings are manufactured strictly according to the production standards. Our factory has more than 40 years of production experience and a professional technical team.

4) Advanced testing instruments: Advanced modern testing equipments to meet the requirements of various types of international standards including ASME, JIS, DIN, EN, BS, KS and GOST.

5) Heat treatment 100%: It is necessary to proceed with the heat treatment 100%, which can make the density more evenly, thereby reducing the risk of crack for the couplings.

6) 100% inspection before delivery: In order to guarantee the quality of couplings, we will carry out several checks, such as thread type and machining accuracy. The machining accuracy mainly includes size, hardness, diameter, wall thickness, length, coating, etc.

7) As well as DNT inspection and Mechanical testing, etc.

Send us a message if you have any questions or request a quote.

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